66682680863 has 32 divisors (see below), whose sum is σ = 72152156160. Its totient is φ = 61404480000.

The previous prime is 66682680859. The next prime is 66682680937. The reversal of 66682680863 is 36808628666.

It is a cyclic number.

It is not a de Polignac number, because 66682680863 - 2² = 66682680859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66682680803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64677158 + ... + 64678188.

It is an arithmetic number, because the mean of its divisors is an integer number (2254754880).

Almost surely, 2^66682680863 is an apocalyptic number.

66682680863 is a deficient number, since it is larger than the sum of its proper divisors (5469475297).

66682680863 is a wasteful number, since it uses less digits than its factorization.

66682680863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 23887872, while the sum is 59.

The spelling of 66682680863 in words is "sixty-six billion, six hundred eighty-two million, six hundred eighty thousand, eight hundred sixty-three".